bakheet, I see you're asking on various threads about pulse machines, and now this GPX5000. Well OF COURSE they (like any metal detector), will "find gold bars" and "gold coins". That's what all metal detectors do afterall

And if you meant:
".... to go deeper than any other for that function", then the answer is: Yes. A pulse (like beach machines) go super deep, and are super sensitive. And the GPX5000 , as a nugget detector, is insanely deep and sensitive. Yup, a gold coin to nearly 2 ft. deep I bet ! And a refrigerator to 10 ft. away I bet !
But it appears no one has told you a dark nasty little secret

Each of these type machines will "ring the bells of notre dame" over every single staple, push-pin, nail, zipper grommet, paper-clip, etc.. So you really need to ask yourself what your objectives are. Not simply "what goes deepest" type questions. I'm not sure about Saudia Arabia, but ..... any place on earth there man-kind has lived, is generally riddled with nuisance little iron type things. So you might need a standard discriminating machine, to at least knock out iron.
Next you mention "gold bars". And in another post you mention "boxes". Those are bigger type items (as opposed to individual fumble fingers coin-searching). So perhaps you should consider a 2-box machine. They will not find an object smaller than about a Soda Can. Perfect "discriminators" for pesky individual coins, nails, etc.... You'll only find larger objects, and to a good-depth at that. Yes it's true that standard machines can often find toaster-oven sized objects just as deep (or even deeper in the case of the GPX5000). But the advantage of the 2-box type, is you simply won't hear or be bothered by anything smaller than soda-can sized objects.